Tire-spreading device



June

1,589,274 G. H. WADSWORTH TIRE SPREADIN'G DEVICE Filed Feb. 8, 1926 Patented June 15, 1926.

A 1,589,114 UNITED STATES PATENT OFF-ICE.

' GEORGE E. 'WADSWORTE, OI AKRON, OHIO, ASBIGNOB. TO THE WLDBWOBTH COBB MACHINE & EQUIPMENT 00., OF AKRON,'OHIO, A CORPORATION 01 OHIO.

l 'rmE-srnmnmonnvrcr.

App1lcation filed. mam a, 1920. serial No. saris.

. This invgention relates to a tool which is particularly adapted for use in spreading the beads of. a tire to make the interior the tire accessible for inspection or repair.

Considerable difiiculty has heretofore been tire, particularly on eavy duty truck tires, and in holding the beads spaced apart sufliciently far to make the interior of the tire accessible 'forinspection or repair.

Moreover there is some-danger to the operator, if the means for holding the tire open, should be released during therepairin operation. e principal object of the present invention is to provide a tool which will s read the beads of the tire quickly andefi'ectwely, and will hold the tire in such open position without danger to the workman until the tool has been manually actuated to releasethe pressure. In this connection, my invention contemplates a tool which" is light in weight, and which does not occupy any ap preciable space within the the cavity during the spreading operation.

A further object of my invention is to make a tool which may be operated to obtain a relatively fast motion of the spread-- in jaws so long as no appreciable ower is reauired to be exerted thereby. lien the power is required, then I contemplate a mechanism which may be selectively operated to change the speed of the jaws to a. relatively slow motion and thereby to increase the power of the tool. Thus the jaws may be qulckly moved into engagement with o the inner walls of the tire and thenmoved slowly to exert considerable pressure fors reading the the beads.- On withdrawing the tool from the tire, the higher speed can be employed so as to facilitate the removal operation. v I

A tool embodying my invention is illustrated in Fig. 1 in side elevation. where a tire .is shown'in' cross section in connection with the spreading jaws; Fig. 2 illustrates an end view of the tool from the actuating end thereof; Fig. 3 is a section taken through the tool on a place indicated by the,

line 3.-3 in Fig. 2; and Fig. 4 is a perspective view of one of the spreading jaws.

M invention as illustrated, embodies two hearing blocks and 11 between which a threaded shaft 12, and a smooth guide bar 1 ar m w d.- ha t t ly ed portion for one half its length,and a portion .for. the other left-hand threaded v half, as shown particularly in Fig; 1. "A

spreadin jaw 15 is in threaded engagementw1th eac threaded portion of the shaft and is in slldable engagement withthe guide bar.

The frame'jaws are each made as shown in Fig. 4 wherein a pocket is formed by a flat surface 16 and a curved surface 17 for receivin the tire bead.- The curved surface 18 shape to conform to the interior curvature of the tire, whereb the tire is prevented from slipping 'o the jaws during the spreading operation, I

To rotate theshaft 12, and thereby to cause relative motion of the ja-ws'along the shaft, I may employ a crank arm 20 which 18 ad acent one end of the shaft 12 andtherefore is accessible for operation at the side,- of the tire which is being spread. In Fig.

3, the arm 20 is shown as'being rigidly mounted upon the sleeve 21, which in turn is slidably mounted upon a stub shaft 22. The stub shaft as illustrated is rigidly connected at one end to the block 11, and'at the other end is shown as having a shoulder 23 which is spaced from the arm 20. The

sleeve 21 has attached thereto a gear 24 and a pinion 25, which are adapted to mesh respectively with a pinion 26 and a a1- 27 which are rigidly mounted on the s aft 12. In Fi 3, however, the gear 24 is shown as being 1n mesh with the pinion 26, while the inion is out of mesh with the gear 27.

nder this condition the shaft 12 will be operated at a higher speed than the arm 20 and as a result the jaws will be spread at the relatively fast 5 eed.

When it is desire to operate thejaws at slow speed, then the arm 20 together with the associated sleeve, gear, and pinion, are moved axially along the stub shaft until the pinion 25 meshes with the gear 27. This occurs when the arm engages the shoulder 23. To hold the arm in either position, I have shown a spring actuated member 30 which is mounted upon the hub of the arm and is' adapted to engage an annular groove 31 or 32 in the stub shaft. When the member 30 is in engagement with the groove 32, then the pinion 25 is in engagement with the gear 2 sad the ea 2% i as? 2? as?! quired, and then to be moved slowly forex- I withoutdan 5*; messestion' is particnlarly'adapted for making the};

inner part of "a tireaccessible in an expeditious manner. The on the shaft 12 is sufficient to lock the aws against opening whenthe. tire isspread to open pos1t1on. Moreover the gear mechanism: being selectively operable,- enables the spreading jaws to be .movedfquickly sozlong as appreciable spreading'p'oweiis not re erting considerable pressure against the beads of the tire; Upon'releasmg the tool the jaws may be moved'at the higher speed,

wherefore the tool may be quickly removed gen to the workman-,

'7 LAB-tire spreading tootcomprising in combinationpa shaft having 'a' right hand threaded portiom'and fa left'..hand' threaded portion, a .jawassociated 1 with each threaded portion, said jaws being-adaptedto engage the'inside walls-eta tire, and means adjacent one end-of the shaft for r'itatin it and for efiiectin relative .motion-of'said jaws along saids aftf' i combination, a threaded shaft having right and left hand threaded portions, a aw associated with each threaded crank'for rotating the shaft.

3. In combination, a'shaft having .a right hand threaded portion and a left 'hand threaded portion, a jaw associated with each portion, and a threaded. portion, a guide bar extending parallel-to the axis of 'the1'shaft and being slidably' engagedxb each of said jaws when the shaft iswrotate {but-allowing movement of the jaws in' 'a'zdireetion axially of the shaft, and means for rotatingsaid shaft.

4-. A tire spreading tool' comprising in combination, spaced "bearing blocks, a threaded shaft'journaled in said blocks and extending therebetween,'-a' uide member also extending between said b ocks and parallel to the axis of the shaft, a jaw in threaded engagement with each'threaded portion of said shaft, each jaw having a portion there of slidably engaging'said member, and a crank operatively associated'with said shaft and mounted for turning movement outside one of said blocks. Y

5. A the spreadin tool comprising in combination, a 'pairzoijaws vadapted to enage'the inner walls of :a tire adjacent the sad portion thereof, a member operatively connected with. one? of the jaws for moving it with relation to the other jaw, aselective pitch of the ;-threads chan a speed gearing associated with said mem er for enabling the speed at which the e. jaweismoved -to be varied, and mea actuating said gearing.

operatively connectedwith one of said jaws in such manner that rotation of the shaft aws each adapts to effects movement of one jaw with'referencd, to the other, gearing adjacent one end-ofthe shaft and operatively connected thereto,"

for actuating the gearing, f

and a crank arm beyond the end of the shaft 7. A tire spreading tool comprising in combination, a rotatable shaft having a right hand threaded portion and a left hand threaded portion, a jaw associated with each threaded 1portion and adapted to engage the inner wa parallel to the axis of the shaft and in enrotation thereof whenever the shaft is of the tire, a member extending w gagement with said jaws for preventing rotated, but allowing movement in a direc 1 'tion parallel to the axis of theshaft, a gear and pinion associated with the'sha'ft, a second a gear and a pinion being shiftableas a unit 3 and being adapted to mesh with the pinion 2. A tirereading toohcom'pmsmg in and gear on the threaded shaft, there being only one (gear and one pinion in mesh" atone time, an

means for enabling the second and pinion to be rotated as a" unit.

'8. In combination, two spaced. bearing se r.

blocks, a threaded shaft journalled therein and having a right hand-threaded portion;

and a lefthand threaded portion, agnide member extending parallel to the axis. of the shaft, a jaw associated with each threaded portion and slidably mounted on the guide member, whereby rotation of the jaws is prevented, but movement in a direc- 'tion axially of the shaft is permitted whenever the shatt is rotated, one of said blocks having an overhanging flange, a gearand a pinion rigidly mounted on the shaft within the confines. of said flan a second gear and pinion also mounted or rotation within the confines of said flange, the last mentioned gear and pinion hein shiftablc axially, whereby the first name gear may engage the second named pinion, or first GEO GE H- .W D W R H.

DISCLAIMER.

1,589,274.--Georg'e H. Wadswoflh, Akron, Ohio. Tmn-SrREAnmo Dnvron. Patent dated June 15, 1926. Disclaimer filed June 14, 1927, by the'patentee.

Therefore enters-this disclaimer to that art of the claims in said specification,

which is in the following words and numera s, to wit:

1. A tire spreading tool comprising 1n combination, a shaft having a right hand threaded portion and a left hand threaded portion, a jaw associated with each threaded portion, said jaws beingadapted to engage the inside walls of a tire, and means adjacent one end of the shaft for rotating it and for effecting relative motion of said jaws along said shaft.

2. A tire spreading tool comprising in combination, a threaded shaft having right and left hand threaded portions, a jaw associated with each threaded portion, and acrank for rotating the shaft.

3. In combination, a shaft having a right hand threaded portion and a left hand threaded portion, a jaw associated with each threaded portion, a guide bar extending parallel to the axis of the shaft and being slidably engaged by each of said jawswhen the shaft is rotated, but allowing movement of the jaws in a direction axially of the shaft, and means for rotating said shaft.

4. A tire spreading tool com rising in combination spaced bearing blocks, a

threaded shaftjournaled in said locks and extending therebetween, a guide member also extending between said blocks and parallel to the axis of the shaft, a jaw in threaded engagement with each threaded portion of said shaft, each jaw having a portion thereof slidably engaging said member, and a, crank operativelv associated with said shaft and mounted for turning movement outside one of said blocks.

[Oyfioial Gazette June 28, 1927.] 

